So proclaimed in 1960, it’s located on the north-western side of the island and has an astonishing interior and coastline beauty which includes the Lakes and Soline.  With five distinct forest tree varieties, abounding fauna, plus lush vegetation, it’s easy to see why Mljet is called the ‘Green Island’.  Of interest, this park represents the first institutionalised attempt to protect the native eco-system in the Adriatic. 
The world renowned lakes of Mljet consists of the Big Lake which covers an area of 145 hectares, (the Small Lake at 24 hectares is considerably smaller) and most interestingly, has its own little island which was donated to the Benedictine order of St Mary. There are not enough words to do this astounding park justice.